[sdiy] question/ waveform generator circuits

[Steven J]

There are various waveforms and corresponding circuits that
produce them. I already know where to find the schematics
of the circuits that create the sawtooth and square waves,
namely at the 'musicfromouterspace' site, but such
waveforms are harsh-sounding and relatively arbitrary. I
want to learn the structure of the circuits that create the
most large and fundamental alterations to the waveforms,
namely:
circuits that vary the amplitude of the peak of the
waveform relative to the progression of a sine wave from
the initial part of the waveform, and circuits that vary
the wavelength of the end of the waveform relative to the
progression of a sine wave from the peak of the waveform.
It may be possible to simultaneously create increases in
both parameters or decreases in both parameters with a
single circuit component, but I'm not sure. I am looking
for an analog circuit that performs these functions
smoothly, as opposed to a circuit that performs them
abruptly and produces resulting harsh sounds, although
it may be possible to easily convert any such
abruptly-altering circuits into smoothly-altering circuits
by substituting certain parts. I ask that someone give me a
link to the schematics of such circuits or a link to a
description of the schematics of such circuits, if any
exist, or reply to me with a crude text drawing of such
schematics and/or a description of the schematics with
words.
__________________________________________________________________________
http://www.webmail.co.za/dialup Webmail ISP - Cool Connection, Cool Price